Calibration method, and base station apparatus, terminal...

Details Calibration method, and base station apparatus, terminal... Calibration method, and base station apparatus, terminal...

2011-03-08

2011-03-08

Nguyen, Duc (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S562100

Reexamination Certificate

active

07904116

ABSTRACT:
An examining unit examines the radio wave environments on at least one of a plurality of frequency channels usable in communications. Based on a result of examination by the examining unit, a selector selects a frequency channel to be used for communications. While using the channel selected by the selector, an execution unit transmits signals from a plurality of antennas to a terminal apparatus and performs calibration on the plurality of antennas by receiving signals from the terminal apparatus via the plurality of antennas.

REFERENCES:
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patent: 2004/0204103 (2004-10-01), Rouphael
patent: 2005/0163244 (2005-07-01), Seto et al.
patent: 2007/0060183 (2007-03-01), Moulsley et al.
patent: 2004-343468 (2004-12-01), None
patent: WO 2004/038988 (2004-05-01), None
Sinem Coleri, et al., “Channel Estimation Techniques Based on Pilot Arrangement in OFDM Systems,” IEEE Transactions on Broadcasting, Sep. 2002, pp. 223-229, vol. 48, No. 3, IEEE.
Jian Liu, et al., “OFDM-MIMO WLAN AP Front-end Gain and Phase Mismatch Calibration”, Radio and Wireless Conference, 2004 IEEE, 2004, 09. 22, p. 151-154.
International Search Report dated Apr. 25, 2006 with English translation.

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